Ichnology of mixed siliciclastic-carbonate sedimentary cycles and their sequence stratigraphic context: Kaladongar Formation (Middle Jurassic) of Kachchh, western India
Journal Title: Volumina Jurassica - Year 2015, Vol 13, Issue 2
Abstract
The Middle Jurassic Kaladongar Formation, Patcham Island, Kachchh, western India, comprises of a 353 m-thick mixed siliciclastic-carbonate succession of asymmetrical shallowing and deepening upward sedimentary cycles. It is subdivided into five main facies i.e., micritic sandstone, allochemic sandstone, sandy allochem limestone, micritic mudrock, and sandy micrite along with shales and conglomerates. Eight trace fossil assemblages comprising 34 ichnogenera are defined, including the [i]Asterosoma[/i], [i]Gyrochorte[/i], [i]Rhizocorallium[/i], [i]Thalassinoides[/i], [i]Planolites[/i]–[i]Palaeophycus[/i], [i]Phycodes[/i], [i]Ophiomorpha[/i], and [i]Skolithos[/i] assemblages that reflect five depositional facies: offshore, transitional, lower, middle, and upper shoreface. The sedimentary packages and associated trace fossil assemblages are separated by various discontinuities, stratigraphic surfaces and stratigraphic boundaries within the succession of the Kaladongar Formation and reveal three phases of regression (RST-I, RST-II and RST-III) and three phases of transgression (TST-II, III and IV) within the 3rd order systems tracts developed in the slowly transgressing sea during the Bajocian-Bathonian time interval.
Authors and Affiliations
Jaquilin JOSEPH, Satish PATEL
Trace fossils from the Lower Jurassic Ciechocinek Formation, SW Poland
Mud-silt deposits of the Lower Jurassic Ciechocinek Formation from the Częstochowa-Wieluń region arecharacterized by a low diversity ichnofossil association, which includes the ichnogenera [i]Planolites[/i], [i]Palaeophy...
Paleogeograficzne i środowiskowe uwarunkowania występowania glonów bentonicznych z górnej jury–najniższej kredy: przykłady z Polski
СИСТЕМА СОБСТВЕННОСТИ КАК ОБЩИЙ РЕСУРС: ПРОБЛЕМА КОЛЛЕКТИВНОГО ДЕЙСТВИЯ
Paleogeografia pienińskiego basenu skałkowego: środkowojurajsko-wczesnokredowa ewolucja na podstawie badań paleomagnetycznych sekwencji Kamenca (Ukraina Zakarpacka)
Sołtyków, Poland – an unique palaeoecological record ot the Early Jurassic continental deposits
The Sołtyków exposure is an old, long time abandoned clay pit. This exposure became known as a classical outcrop of alluvial-lacustrine deposits. Floral remains point to the earliest Jurassic (Lias α1-2) age, and the se...